Features: The sensor module has strong adaptability to environmental light, features pair of infrared transmitting and receiving tubes, and the detection distance can be adjusted through the potentiometer knob, the effective distance range 2~30cm, and the working voltage 3.3V-5V. When the module detects the front obstacle signal, the green indicator on the circuit board lights up at the level, and the OUT port continuously outputs low level signal. The module detects distance of 2~30cm and a detection angle of 35 . It has the characteristics of small interference, easy assembly, easy use, etc. It can be widely used in robot obstacle avoidance, obstacle avoidance car, pipeline counting, black and white line tracking, and many other occasions. The output port OUT of the sensor module can be directly connected with the IO-port of the microcontroller, or directly drive a 5V-relay; Connection mode: VCC-VCC; GND-GND; OUT-IO. The sensor active infrared reflection detection, target reflectivity and therefore the shape critical detection distance. Where the minimum detection distance black, white-maximum; small objects away from a small area, a large area from Grand. The module can be powered by DC3-5V power supply. When the power supply connected, the red power indicator will be on. The comparator adopts LM393, stable in operation; with 3mm screw holes, easy to fix and install. Specifications: Material: ABS+Printed Circuit Board Length: Approx. 3.2cm/1.26inch Effective Distance Range: 2-30cm/0.78-11.8inch Working Voltage: 3.3V-5V Module Interface Description: VCC-externally connected with 3.3V-5V voltage (it can be directly connected with 5V MCU and 3.3V MCU) GND-external GND OUT-small board digital output interface (0 and 1) Note: The threshold comparison voltage of each module has been adjusted through the potentiometer during shipment. Do not adjust the potentiometer at will unless under special circumstances. Package includes: 1x Obstacle Avoidance Sensor Module